Hi Nicol,
This can be accessed via custom controller present in BT116H_SRVO component.
Data: lr_cuco type ref to CL_BT_H_CUBTPARTNERCU,
lr_entity type ref to cl_Crm_bol_entity.
lr_cuco ?= get_custom_controller( 'BT116H_SRVO/CUBTPartnerCuCo' ).
then lr_cuco has all the partner context nodes which are having the content of BTPARTNER/Partner
lr_entity ?= lr_cuco->typed_Context->BTPARTNER->get_Current( ) will give you the partner entity where you can take the collection for all partner entities.
Regards,
Naresh